int hashCode()
描述 (Description)
java.util.PropertyPermission.hashCode()方法返回此对象的哈希码值。 哈希码由权限名称确定。
声明 (Declaration)
以下是java.util.PropertyPermission.hashCode()方法的声明
public int hashCode()
参数 (Parameters)
NA
返回值 (Return Value)
此方法返回此对象的哈希码的整数值。
异常 (Exception)
NA
例子 (Example)
以下示例显示了java.util.PropertyPermission.hashCode()方法的用法。
package com.iowiki;
import java.util.Date;
import java.util.Hashtable;
import java.util.PropertyPermission;
public class PropertyPermissionDemo {
private static Hashtable<PropertyPermission, Date> validity;
public static void main(String[] args) {
// Build property permissions validity collection
validity = new Hashtable<PropertyPermission, Date>();
validity.put(new PropertyPermission("java.home.usr", "read"),
new Date(2012, 12, 31));
// Get permissions and validity
checkFilePermissions("java.home.usr");
}
private static void checkFilePermissions(String path) {
// Hashcode is calculated by name
PropertyPermission permission = new PropertyPermission(path, "read");
System.out.println("Has permissions on "+path+
" for read, Till: "+validity.get(permission));
}
}
让我们编译并运行上面的程序,这将产生以下结果 -
Has permissions on java.home.usr for read, Till: Fri Jan 31 00:00:00 IST 3913